THYROID PHARMACOLOGY AND PHYSIOLOGY MCQS 1. Thyroid hormones exert pleiotropic effects in almost all tissues of the body . 2. Thyroid stimulating hormone (TSH) is produced by the thyrotroph cells in the posterior pituitary gland 3. TSH receptor are expressed on the thyroid para follicular cells. 4. A very small increases in thyroid hormone secretion reduce TSH secretion in a log-linear relationship. 5. T4 is the main regulator of TSH. Answers 1. TRUE-This influences brain and somatic development in infants and metabolism in adults. 2. FALSE -TSH is an anterior pituitary hormone and secretes in response to negative feedback from circulating thyroid hormones. 3. FALSE-TSH receptors are expressed on thyroid follicular cells. 4. TRUE-The reason why the TSH is the most sensitive screening test for thyroid dysfunction 5. FAKSE – T3 is the main regulator since it binds to the thyrotroph nuclear thyroid hormone receptor while T4 acts via conversion to T3 THYROID PAHYSIOLOGY MCQS 1. 70 %TO 80% ...
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